1.5 mm thick flat mineral crystal with slight bevel. you test the accuracy of your device. If in the UK - obtain a 10p coin. Royal Mint state that. For example - if you. and when you are finished you can checkout.
6pcs Watch Glass Crystal Lens, 41.5mm Dia. 1.2mm Thick Double Dome Watch Glass
3pcs Watch Glass Crystal Lens, 25mm Dia. 1.1mm Thick Double Dome Watch Glass
Watch Glass Crystal Lens Waterproof General Easy Replaceable Plastic Acrylic
Watch glass crystal face lens, 1mm thick, flat mineral glass, sizes Ø 10-50mm
DOMED FLAT BOTTOM Watch Glass Crystal face lens, SINGLE-DOME mineral glass
2PCS Thick 1.2mm Watch Glass Crystal 16-40mm Lens Flat Round Mirror Watch Parts
